A built-in grill island should be sized from the appliances out: the grill cutout, counter landing space on both sides, and room for the tank compartment and storage. Depth and length then have to suit your patio, with enough space left around the island to walk, cook and sit comfortably.
Choose the grill first, because its cutout dimensions set the layout. Built-in grills commonly run about 30 to 42 inches wide, and each model has its own cutout and clearance requirements. Plan counter space on both sides for platters and prep, and add the width of a side burner, refrigerator or doors. The propane tank also needs its own vented compartment with an access door, which takes up part of the island's length.
Then check the island against the patio. Counters are commonly around 36 inches high, with a raised bar ledge a bit higher, and islands usually need enough depth for the grill body and its hood. Leave a clear walkway behind the cook and room for stools at any bar seating. Tape the outline on the patio and stand in it. That simple test shows problems with traffic flow or door swings before anything is built.
Size also drives cost, since price rises with linear feet of counter, and L or U shapes cost more than a straight run. Our islands range from $10,000 for a basic built-in grill island to $50,000+ for a long island with several appliances. Consider cord reach too, because a plug-in refrigerator has to reach an existing exterior outlet. We confirm the final dimensions against the appliance specifications during design, before framing starts.
Answered by Legacy Construction & Design · CA License #790442 · October 2026